Core for molds for casting curved stereoplates



Jan. 3, 1928.

C. WINKLER GORE FOR MOLDS FOR CASTING CURVED STEREOPLATES Filed Dec. 9,1926 igt I.

Patented Jan. 3, 1928.

CARL WINKLER, 0F BERN, SWITZERLAND.

essee OFFICE.

CORE FOR MOLDS FOB CASTING CURVED STEREOPLATES.

Application filed December 9, 1926, Serial No. 153,674, and in GermanyDecember 31,1925.

Experience shows that the molds used for casting curved stereo-platescool down better at the ends than in the middle. In order to obtain amore uniform temperature of the mold, the present invention providesthat thin ribs, inside the core, are so arranged that a better coolingeffect is obtained in the middle of the mold than at the ends. For thispurpose the ribs can be placed closer together towards the middle of thecore;

they can also have a thinner section and a larger surface.

Plates cast in a mold having a core of this kind are more accurate,without requiring boring, and they also produce better printing, andneed much less make ready.

In the drawing the core of a mold for curved stereo-plates, constructedaccording to the invention, is shown by way of eXamthe line AB in Fig.2, and Fig. 2 a section on the line C'D in Fig. 1.

plc Fig. 1 being a longitudinal section on,

The core has the usual shape and it is provided with a cooling jacketain which water 7 by Letters Patent of the United States is:

In a core for a mold for casting curved stereo-plates the combination ofa water acket inside said core and of ribs on the core wall proect1ng'1nto said water acket 7 and arranged nearer together in themiddle of the core than at the ends.

In testimony whereof I have signed my name to this-specification.

CARL -WIQNKLER.

